TY - JOUR
TI - Study on seepage characteristics and model of orthotropic anisotropy coal
AU - Yang Shi-Qiang
AU - Teng Teng
AU - Zhang Jing
AU - Gao Guo-Liang
AU - Ren Chao-Yang
JN - Thermal Science
PY - 2024
VL - 28
IS - 4
SP - 3485
EP - 3491
PT - Article
AB - The extraction of coalbed methane can ensure the safe production of coal  mines and the efficient use of resources. According to the anisotropy of  coal seam, CT spi­ral scanning and triaxial gas seepage tests are carried  out, the seepage character­istics of orthotropic coal are analyzed, and a  coal permeability model considering orthotropic structure is proposed.  Results show that: The permeability of parallel bedding direction changes  obviously with axial pressure. The confining pressure is 5 MPa, the  permeability in the parallel bedding direction is about 1.6 times that of  the vertical bedding, and the confining pressure is 13 MPa, the permeability  in the parallel bedding direction is about 1.01 times that of the vertical  bedding. The coal permeability model with anisotropic structure is verified  by the experiment data in both parallel and vertical bedding directions, and  shows great applicability. Re­search results provide references for the  efficient development of coalbed methane.